Ill. Admin. Code tit. 77, pt. 890, subpt. M, app A, tbl. Q

Current through Register Vol. 49, No. 2, January 10, 2025
Table Q - Allowance in Equivalent Length of Pipe for Friction Loss in Valves and Fittings

The following applies to all types of material approved for potable water distribution:

Equivalent Feet of Pipe for Various Pipe Sizes

Valve or Fitting

1/2"

3/4"

1"

11/4"

1 1/2"

2"

2 1/2"

3"

45° ell (wrought)

0.5

0.5

1.0

1.0

2.0

2.0

3.0

4.0

90° ell (wrought)

0.5

1.0

1.0

2.0

2.0

2.0

2.0

3.0

Tee, Run (wrought)

0.5

0.5

0.5

0.5

1.0

1.0

2.0

-

Tee, Branch (wrought)

1.0

2.0

3.0

4.0

5.0

7.0

9.0

-

45° ell (cast)

0.5

1.0

2.0

2.0

3.0

5.0

8.0

11.0

90° ell (cast)

1.0

2.0

4.0

5.0

8.0

11.0

14.0

18.0

Tee, Run (cast)

0.5

0.5

0.5

1.5

1.0

2.0

2.0

2.0

Tee, Branch (cast)

2.0

3.0

5.0

7.0

9.0

12.0

16.0

20.0

Compression Stop

13.0

21.0

30.0

-

-

-

-

-

Globe Valve

-

-

-

53.0

66.0

90.0

-

-

Gate Valve

-

-

1.0

1.0

2.0

2.0

2.0

2.0

Ill. Admin. Code tit. 77, pt. 890, subpt. M, app A, tbl. Q